http://www.boston.com/news/local/massachusetts/articles/2005/04/29/arrested_father_had_point_to_make/ http://www.article8.org/docs/news_events/parker/main.htm
or this:
http://www.article8.org/docs/news_events/parker/main.htm
There's only one answer - get your kids out of the public schools and cut off their funding stream. Private or religious school or homeschool only.
He should confront the school board and elected officials, or try home schooling if none of that works.